diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 76f77cb..b2fc4cd 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -17850,6 +17850,15 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
         Return information about a file.
        </entry>
       </row>
+      <row>
+       <entry>
+        <literal><function>pg_report_log(<parameter>message</> <type>text</type>])</function></literal>
+       </entry>
+       <entry><type>void</type></entry>
+       <entry>
+        Write message into log file.
+       </entry>
+      </row>
      </tbody>
     </tgroup>
    </table>
@@ -17918,6 +17927,18 @@ SELECT (pg_stat_file('filename')).modification;
 </programlisting>
    </para>
 
+   <indexterm>
+    <primary>pg_report_log</primary>
+   </indexterm>
+   <para>
+    <function>pg_report_log</> is useful to write custom messages
+    into current log destination and returns <type>void</type>.
+    Typical usages include:
+<programlisting>
+SELECT pg_report_log('Message');
+</programlisting>
+   </para>
+
   </sect2>
 
   <sect2 id="functions-advisory-locks">
diff --git a/src/backend/utils/adt/misc.c b/src/backend/utils/adt/misc.c
index c0495d9..6c54f3a 100644
--- a/src/backend/utils/adt/misc.c
+++ b/src/backend/utils/adt/misc.c
@@ -76,6 +76,23 @@ current_query(PG_FUNCTION_ARGS)
 }
 
 /*
+ * pg_report_log()
+ *
+ * Printing custom log messages in log file.
+ */
+
+Datum
+pg_report_log(PG_FUNCTION_ARGS)
+{
+
+	ereport(MESSAGE,
+			(errmsg("%s", text_to_cstring(PG_GETARG_TEXT_P(0))),
+			errhidestmt(true)));
+
+	PG_RETURN_VOID();
+}
+
+/*
  * Send a signal to another backend.
  *
  * The signal is delivered if the user is either a superuser or the same
diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c
index 088c714..2e8f547 100644
--- a/src/backend/utils/error/elog.c
+++ b/src/backend/utils/error/elog.c
@@ -302,7 +302,7 @@ errstart(int elevel, const char *filename, int lineno,
 								elevel == INFO);
 	}
 
-	/* Skip processing effort if non-error message will not be output */
+	/* Skip processing effort if non-error,custom message will not be output */
 	if (elevel < ERROR && !output_to_server && !output_to_client)
 		return false;
 
@@ -2062,6 +2062,7 @@ write_eventlog(int level, const char *line, int len)
 		case DEBUG3:
 		case DEBUG2:
 		case DEBUG1:
+		case MESSAGE:
 		case LOG:
 		case COMMERROR:
 		case INFO:
@@ -2917,6 +2918,7 @@ send_message_to_server_log(ErrorData *edata)
 			case DEBUG1:
 				syslog_level = LOG_DEBUG;
 				break;
+			case MESSAGE:
 			case LOG:
 			case COMMERROR:
 			case INFO:
@@ -3547,6 +3549,7 @@ error_severity(int elevel)
 		case DEBUG5:
 			prefix = _("DEBUG");
 			break;
+		case MESSAGE:
 		case LOG:
 		case COMMERROR:
 			prefix = _("LOG");
@@ -3666,6 +3669,9 @@ is_log_level_output(int elevel, int log_min_level)
 	/* Neither is LOG */
 	else if (elevel >= log_min_level)
 		return true;
+	/* If elevel is MESSAGE, then ignore log settings */
+	else if (elevel == MESSAGE)
+		return true;
 
 	return false;
 }
diff --git a/src/include/catalog/pg_proc.h b/src/include/catalog/pg_proc.h
index 6fd1278..62c619a 100644
--- a/src/include/catalog/pg_proc.h
+++ b/src/include/catalog/pg_proc.h
@@ -5344,6 +5344,11 @@ DESCR("tsm_bernoulli_reset(internal)");
 DATA(insert OID = 3346 (  tsm_bernoulli_cost		PGNSP PGUID 12 1 0 0 0 f f f f t f v 7 0 2278 "2281 2281 2281 2281 2281 2281 2281" _null_ _null_ _null_ _null_ _null_ tsm_bernoulli_cost _null_ _null_ _null_ ));
 DESCR("tsm_bernoulli_cost(internal)");
 
+/* Logging function */
+
+DATA(insert OID = 6015 (  pg_report_log		PGNSP PGUID 12 1 0 0 0 f f f f t f v 1 0 2278 "1043" _null_ _null_ _null_ _null_ _null_ pg_report_log _null_ _null_ _null_ ));
+DESCR("write message to log file");
+
 /*
  * Symbolic values for provolatile column: these indicate whether the result
  * of a function is dependent *only* on the values of its explicit arguments,
diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h
index fcb0bf0..3a2164b 100644
--- a/src/include/utils/builtins.h
+++ b/src/include/utils/builtins.h
@@ -495,6 +495,7 @@ extern Datum pg_typeof(PG_FUNCTION_ARGS);
 extern Datum pg_collation_for(PG_FUNCTION_ARGS);
 extern Datum pg_relation_is_updatable(PG_FUNCTION_ARGS);
 extern Datum pg_column_is_updatable(PG_FUNCTION_ARGS);
+extern Datum pg_report_log(PG_FUNCTION_ARGS);
 
 /* oid.c */
 extern Datum oidin(PG_FUNCTION_ARGS);
diff --git a/src/include/utils/elog.h b/src/include/utils/elog.h
index 7684717..3054d3c 100644
--- a/src/include/utils/elog.h
+++ b/src/include/utils/elog.h
@@ -16,6 +16,9 @@
 
 #include <setjmp.h>
 
+/* Custom log message */
+#define MESSAGE		9			/* Custom messages to log file*/
+
 /* Error level codes */
 #define DEBUG5		10			/* Debugging messages, in categories of
 								 * decreasing detail. */